Hey guys i want to know EXACTLY what engine i have... im confused as there are different variants. I have 1983 dodge ram 50 2L 4 speed. on the firewall the plate that says what engine i have says it is a 4g63... Ive heard about a g63b as well and im just confused.... i want to know because i want to start buying parts but i want to know what parts will fit which

Thanks